山梨醇缩醛类成核剂生产中的废水回用技术

Technology for Recycling Wastewater from Production of Sorbitol-acetal-type Nucleating Agents

在介绍山梨醇缩醛成核剂合成原理和生产工艺的基础上,重点介绍了该类成核剂生产过程中废水的来源。研究表明,利用常规的絮凝剂及Feton试剂氧化法均无法使废水达到排放标准。在不考虑投资大、施工周期长的生化处理技术的前提下,进行了废水回用试验。小试和工业试验结果表明废水回用不会对产品熔点和白度造成影响。直接将废水回收再利用,每生产1t成核剂,可减少外排污水7t。

This article describes how sorbitol-acetal-type nucleating agents are synthesized with the focus on where the wastewater present during the production of these nucleating agents comes from.Research shows that no conventional flocculating agent and Feton reagent oxidation methods can make the wastewater meet discharge standards.Researchers conducted a wastewater recycling experiment without performing biochemical treatment which requires high costs and long operating time.Pilot and industrial-scale experiments show that using recycled wastewater will not affect product＇s melting point and whiteness.Recycling wastewater can re- duce sewage discharge by up to 7t for every one ton of nucleating agents produced.